Korea Advanced Institute of Science and Technology · Engineering
Professor Daejun Chang's research lab specializes in sustainable energy systems and maritime energy management, focusing on the integration of alternative energy sources such as liquid hydrogen and liquefied natural gas (LNG) in marine propulsion and energy storage. The lab develops advanced control strategies using deep reinforcement learning and reliability analysis to optimize energy efficiency, reduce emissions, and enhance safety in complex energy systems. Key research directions include energy management in hybrid electric ships, cold energy recovery from LNG, and risk assessment for hazardous processes in offshore and maritime applications.
Figures are computed from collected data and may differ slightly.
This study proposed a strategy for selecting an optimal propulsion system of a liquefied hydrogen tanker. Four propulsion system options were conceivable depending on whether the hydrogen BOG (boil-off gas) from the cryogenic cargo tanks was used for fuel or not. These options were evaluated in terms of their economic, technological, and environmental feasibilities. The comparison scope included not only main machinery but also the BOG handling system with electric generators. Cost-benefit analy
This paper proposes a methodology for economic evaluations of liquefied natural gas fuel gas supply (LNG–FGS) systems. To evaluate the economics of various LNG–FGS systems, expected operating expenditures during long-term voyages were compared, including the loss from venting boil-off gas (BOG) to prevent overpressurisation of the fuel tank, penalties for venting BOG, expenses for consuming marine diesel oil when LNG–FGS systems are unavailable, and expenses for electricity consumption. A second
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